palatine tonsil

one of a pair of almond-shaped masses of lymphoid tissue between the palatoglossal and palatopharyngeal arches on each side of the fauces. They are covered with mucous membrane and contain numerous lymph follicles and various crypts.

palatine, palatal

commonly diagnosed in companion birds. Are often accumulations of keratinized cellular debris as a result of a dietary deficiency of vitamin A.

palatine fissure

narrow gap beside the palatine process of the incisive bone; covered by the vomeronasal organ and pierced by the naso-incisive duct.

palatine process

medial and lateral palatine processes contribute to the development of the palate and the separation of the oral and nasal cavities.

palatine sinus

one of the paranasal sinuses connecting with the nasal cavity that is particularly large in ruminants.

palatine slit

the caudal half of the palate in birds is divided by a median choanal slit.

palatine tonsil

tonsils found on the ventrolateral border of the soft palate, which are large and housed in a tonsillar sinus in dogs and cats, are absent from the pig and are follicular in ruminants and the horse.

tonsil

1. a small mass of lymphoid tissue, especially that found in close association with the mucous membrane of the throat; generally used alone to designate the palatine tonsil. Other structures referred to as tonsils are the cecal, lingual, esophageal, paraepiglottic, pharyngeal and tubal lymphoid aggregations.

2. a small mass of tissue.

cecal tonsil

the accumulated mass of lymphoid tissue in the wall of cecum especially the proximal segment of the avian cecum.

cerebellar tonsil

a rounded mass forming part of the cerebellum on its inferior surface.

esophageal tonsil

large volume of lymphoid tissue in the caudal segment of the duck's esophagus.

follicular tonsil

a tonsil bearing numerous invaginations of its surface epithelium (fossulae) each surrounded by lymphoid tissue to form a follicle, as in the palatine tonsils of cattle or the lingual tonsils of the horse.

lingual tonsil

diffuse collection of lymphoid tissue near the tongue root of most mammals.

palatine tonsil

see palatine tonsil.

paraepiglottic tonsil

a collection of lymphoid tissue craniolateral to the epiglottic base.

pharyngeal tonsil

a collection of lymphoid tissue in the roof of the nasopharynx in pigs.

soft palate tonsil

lymphoid tissue within the soft palate; principal tonsils in pigs in which it forms twin smooth patches of mucosa.

tubal tonsil

the lymphoid tissue clustered close to the pharyngeal orifice of the auditory tube.

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